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Hey,
I recently started trying my hand at creating function blocks.
At the moment I'm trying to create a PID function block, however I keep getting this error:
"ERROR: Variable does not have enough size."
No idea why it does this. Can anyone help?

I have a function block where the first internal variable is showing as address H1420 in the Global Symbol table. When I add another retained variable to the function block then save and compile the code, the variable address in the global symbol table shifts from H1420 to H1488. I need to retain the address as I will be downloading code and I need to ensure the address if H1420 stays with that variable.
Can anyone help with this?

Hello all.
I posted earlier in the week regarding downloading new code to an Omron PLC, but I think the question was a bit vague. As a follow up, and hopefully to clarify, I have the following query.
I have created an upgraded program which will be downloaded by field techs using memory cassettes. The revised area of code is essentially a Function Block which amends service lamp behaviour, and in creating it, I have amended the existing function block and added new Internal variables. Is there any way I can ensure that the new variables don''t over write or move the existing variables in the PLC, because this is what is happening when I download it.
HELP!!!!!!!!!

hello.
I've been trying to communicate this omron plc CP1L-EM30DT1-D, with a yaskawa inverter cimr-vu4a0004faa.
but i can't figure out how to make de correct mov or configuration in de DM.
i need to run/stop, change frequency.
some help, please. :)
485PRUEBA.cxp
485PRUEBA.opt

I've got a 300 with Motionview that I'm going to run using the IOD connector with discrete signals. First time to touch one of these. I see the pin 29 is enable/inhibit. I've tried +24VDC, 0v, and nothing and the drive will never 'enable'. What am I missing? I've got the the STO where the safety1 & 2 inputs are tied to +24VDC and the commons shorted together. I tried unshorting the commons. I tried removing the connector altogether. I've read the manual, there nothing mentioning 'enabling' other than that pin 29 being high, which obviously doesn't work for me. Any help?

Hello all.
I have been working with an SLC 5/04 system, which houses various Digital and Analog INs and OUTs, up to Slot 29. I am currently mainly working with Slot 25, an Analog Input: 1746-NI16I. This is a system which has already been set up and has been running for the best part of 8-10 years. This particular card has had some spare inputs, one of which I am trying to connect to. In the Advanced Configuration, only a few Channels are actually "Enabled", and each channel is pretty much slightly different from another in terms of Input Type, Filter Frequency and Data Format. I am trying to set up Input 14, which is Channel 15, to "Enable" it, 4-20mA Input Type, Filter Frequency of 6 Hz and Data Format of either Raw/Proportional or Engineering Units.
Now, after I have made my choices, I click apply, and then OK. I am then confronted by a pop-up which states:
"Configuration Rung and Data
Integer Data File Number: 25
Integer Data Element: 100
Rung to be inserted: XIC S2:1/15 COP #N25:100 #O0:25.0 24
At Program File Number: 4 82"
I have the options of OK or Cancel. If I click OK, I now have LAD 4, Rung 82 Highlighted. This First Scan Bit and COP function were already here, but does that mean I have now altered what is being written to "#O:25.0"? I now Download the Changes. However, after all this, I am not getting any Analog input reading coming in from the Live PLC.
What is this COP function? What does it do? How do I properly set up this Analog Card?
Thanks for your time,
-Jame

So I did this simple Function Block, pretty simple, and yet it keeps giving me this error, after a bunch of failed combinations the error persists, without telling me whats wrong. And therefore won't even allow me to download the program to the PLC (CJ2M CPU31) or even simulate.
I heard it's a simple thing to fix but I really dont know how to, since I'm quite new to this.
Here's the function block itself in the picture and the programming inside it, although since it gives me no errors, i don't think that would be the problem

Is there a Block Compare Instruction like the one in Omron PLC for Mitsubishi PLC?
If the Omron PLC is BCMP (68), then what is the name of the instruction on the Mitsubishi PLC?
I tried to use BKCMP in the Mitsubishi PLC, but the way it works is not the same as the one in Omron PLC

Hello.
How can I get bit addressing of defined variable in function block?
For example:
- I define variable type DUINT with name Double_VarI_INT.
- I want to get or set one bit out of it (its double word).
- If I use Double_VarI_INT.0 I got error.
Best regards.

Hello,
I am trying to define a struct as an input variable for a Function or Function Block.
For example the function AddDelimiter (This is a standard Sysmac function), has a input variable with the variable type Struct, an it is possible to couple a struct to this input (See picture below).
If i try to make my own function block with a struct or Structure as an input data type, i get the following error (See picture below).
When I try to define a struct from the data types (In this case struct: Test) it doesn't give a error.
But when I try to couple a struct to this input, that is a layer deeper than the function block struct i get the following error (See picture below).
How can i define a struct as an function/ function block input?
Thanks in advance.

Anyone ever used a Wait-for digital tag in a C Program?
I have to use C in the Red Lion Programs.. but, I'm not at all proficient in C (or anything else for that matter ..)
Here’s a nice problem for basic C programming .. I really need to solve it .. but, so far ... can't ... sigh!:
I have an actuator that will be commanded to make sine wave motion. The program that does that, in the actuator’s driver-controller, requires the actuator to first be in a zero position. Homing has already been done, so the drive knows where the actuator is. I cannot modify the sine wave program; but, can command a Move Absolute program in the drive, to take the actuator to zero, if it isn’t already there. When the actuator is at zero, it is “In position” and a digital tag will go True. If the Tag is False, the actuator is not at zero, it’s at some other position, and only the Move Absolute program can return the actuator to zero.
So, when launching this position command program, In a Red Lion G3 HMI, using only Basic C programming, how would you write a control program that would test the status of the actuator’s position, and, finding it at zero (the “InPos” tag is true) would start the Sine Wave program. And, If the “InPos” Tag is false, would start the Move Absolute program, which would return the actuator to zero, and when the actuator is In Position, would start the Sine Wave program.
Here’s the tricky part. It will take only a few milliseconds to start the Move Absolute program (if required) .. but how do you get the “C” control program you are writing, to wait until the actuator actually reaches zero, and the “inPos” tag goes true … which could take several seconds?
I don’t believe there is a WaitFor function in “C” , and you cannot send either the Move Absolute, or the Sine Wave program more than once .. so, if a loop is used, it can loop only one time .. presumably with conditional delays. (however that's done) You cannot use Sleep().. that would be cheating.. the full program must run in the least amount of time, and you do not know how far the actuator is from zero.
You could use if (! InPos) or if (InPos) to qualify what programs to run .. but, where does the “Wait for In position” fit into C Programming? You might be able to use Continue .. but, ya still have to wait for “InPos” to go True…..before running the Sine Wave. Thanks Much, Regards, Michael

Hi,
I'm working in so machine basic v1.5 and I'm wondering if it is possible to change the start time and stop time in a schedule block with a %MW. So is there a possibility to for example say %CH0.??? := %MW5 in an operation block? And is there a page where u can see al the possible codes. I already discovered that %TM0.P changes its preset but i don't find a list of al those possibility's.

Hi All,
I'm still quite new to Unity and Modicon PLCs. I have a PLC program running in simulation mode for development/test and I'd like to follow the logic inside a running block. I can't seem to just double click the function block while online to see it's 'inside' logic.
Is there a way to inspect the inside of a running function block? How can I check and diagnose the logic a running function block?
Thanks!

Good morning folks,
I've browsed this forum often enough over the past few years that I think it's time I finally signed up. Lots of good ideas and advice that I've benefited from and I hope to return the favour some day.
So on to my question....
I'm currently knee deep in a project using a CJ2M PLC and I have to send and receive chunks of data over Ethernet/IP. To do this, I'm using the ESATR and EGATR commands (set / get attribute). I would like to know if these commands finish execution (ie. the ethernet port completes the transaction) even if the input conditions to the command are no longer true. Specifically, if I use the "port ready" system flag (A202.00 is an input to my FB in this case) as a condition to trigger the ESATR command, this bit will go low once the port becomes busy (ie. during execution). So will that interrupt the completion of the ESATR command resulting in an incomplete transaction and data loss? I've looked through the help files on the command but don't get a clear picture of how it behaves.
Perhaps the attached JPEG shows more clearly what I mean.
Thanks,
PC

Can Anyone Come Up with the Screen Shots or a video link of procedure for Displaying Real Time Sinusoidal Waveforms From Satec MFM ON GE FANUC??
I have PACsystem RX3i via Serial Communications Module-IC695CMM002

Hello,
Im looking for the in built function blocks, but i cannot find it in the program files/ omron folder where the manual says (even with search for *.cxf), perhaps i dont have it installed, but where can i get them from?
As i remember i downloaded cx-one from the official omron web page after login etc, so thats why i dont understand why am i missing the fb libraries
What else place there is to find useful FB-s?
Thanks!

Hello.
A colleague sent me a screenshot (attached) with a peculiar issue. An ADD function that only sends 0 as the outcome, and a DTOS function that only sends " .
I have confirmed that all variables used in the ADD block are declared as integers, and both SumInt6 and String10 are not currently being modified somewhere else.
This impatient colleague is baffled, while I am just sharing this issue in the hopes that someone will eventually come with the simple answer that we are overlooking, or a complex one that we could never hope to realize by ourselves.
Thanks in advance.

Hi!
Anyone can help regarding this issue. I'm not able to monitor the Motor Block that I have created. there's no error either in the output screen but i'm thinking what is the cause of not running in the simulation which shows the Motor Folder RED even it was compiled.
thanks for the help!
Note: I'm new in mitsubishi.

Hello,
I have a problem that I need to solve in a PLC program has it's projectlib locked.
I work for a company that contracted a PLC programmer before my time to program their new version of their control cabinets.
The company did not write any specific contract with the contractor and just relied on his work. The guy later delevered a buggy software that is kind of functional (the bugs came up at the commissioning after the guy was paid and now he refuses to help or to provide more consultations).
I have as a task to freshen this up and make it work without bugs, the problem is that the Projectlib is locked and I cannot access the source code.
The only thing that I can changes that I can make to the code is to put some logical circuits between the I/O of the already existing function blocks, which solved some problems, but not all and it keeps one of the most important ones as well.
Anyways, that's my story, so now my question is, is there and possible way of unlocking the projectlib?
Any feedback would be highly appreciated.
Thanks in advace!

Hi,
i want to make a function block which will contain a block GP.CPRTCL (for predefined comm protocol). GP.CPRTCL has an input "Un" who only receives constant (H,K). On input of my own function block i can set a constant variable, but inside block that variable isn't a constant anymore (GP.CPRTCL doesn't recognize a variable).
Is there a way for receiving constant variable in GP.CPRTCL block ("Un") if it is in another block.
Regards

Hi everyone,
I need some help with my PLC programming. I am currently using a twincat 2 software and a Beckhoff CX 8090. Basically, the gist of my program is to send and receive data and datalog the input data received from the sensors and timestamp the received data for every 1 second. I want to create a boot up counter where it will count the number of times my data logging program has restarted(if it did). This boot up counter serves as a health monitoring check to ensure that my program is running perfectly and thus, not restarting randomly when it shouldn't. I am more familiar with structured text so if you have a solution, kindly post it in structured text form. Your help would be greatly appreciated.
Best regards,
DeadPool